Question

Sine Cosine and tangent help!! I did these problems and i was sure i was right but I keep missing them... Can you help me figure out what I did wrong???

Answer 1

I had to find x

Answer 2

and roundto the nearest tenth

Answer 3

my second answer i got was 11.04

Answer 4

is that right

Answer 5

i dont wanna submit it until i know

Answer 6

sin 34 = opp/hypo

Answer 7

0.559 = 12/x
x = 12/0.559

Answer 8

oooh ok so 21.5

Answer 9

looks good.

Answer 10

solving for x i got 41.4 degs

Answer 11

but i i think i know what ive been doing wRong

Answer 12

What x do you need?
tan x
cos x or sin x?

Answer 13

well i use sin bc we have the opp and hypo

Answer 14

wait i got .7222... am i supposed to do inverse sin?

Answer 15

Yes 0.722 is correct.

Answer 16

So we know
sin x = 0.722
therefore x = ?

Answer 17

i got 41.4

Answer 18

I got x = 46....

Answer 19

wait it woul be 46.2

Answer 20

yeah ok

Answer 21

yes 46.2 should be good..

Answer 22

how do you know when to use inverse???

Answer 23

that confuses me

Answer 24

\[\sin \theta = x\]

\[\theta = \sin^{-1} x\]

Answer 25

where does the theta come in... i dont really understand that part

Answer 26

So say
\[\sin 30 = \frac{ 1 }{ 2 }\]

\[\theta = \sin^{-1} \frac{ 1 }{ 2 }\]

Answer 27

so theta = 30

Answer 28

why does theta equal 30?

Answer 29

ooooh ok nvm i see it

Answer 30

because sin 30 = 1/2

Answer 31

itwas an example haha

Answer 32

Yes.
That was an example.

Answer 33

i got 61.4

Answer 34

Find hypo first.

Answer 35

how do i do that?

Answer 36

i set it up like tanX = 15/14

Answer 37

Hypo = 15^2 + 14^2

then we take the square root of that answer.

Answer 38

tan x = 15/14 is also good

Answer 39

oooh duh pythagorean theorem lol

Answer 40

soo do i need to find hypotenuse? or can i solve the problem w/o it?

Answer 41

You can use tan X TO find it..

Answer 42

ooooh

Answer 43

ok i worked it out and got 47 degrees

Answer 44

i got cosX = .8

Answer 45

then i got 36.9 by arccos

Answer 46

is that right?

Answer 47

@Whitemonsterbunny17 hey u any good at trig?

Answer 48

or @mathmate can you check my last one to see if its right?

Answer 49

Yes, that is correct, well-done! :)

Answer 50

thanks! one more?